Nut lock



Patented Sept. 18, 1945 NUT LOCK Hugh J. Gallagher, Gallitzin, Pa., assgnor to Matilda McMullen, Buffalo, N. Y.

Appiieation April 7, 1943, serial No. 482,167

1 Claim.

My invention relates to fastening devices, and has among its objects and advantages the provision of an improved lock nut.

In the accompanying drawing:

Figure 1 is a view illustrating the bolt and the nuts tightened;

Figure 2 is a similar view illustrating the nuts connected against relative rotary movement;

Figure 3 is a sectional view substantially along the line 3-3 of Figure 2;

Figure 4 is a plan view of one of the nuts;

Figure 5 is a plan view of a companion nut; and

Figure 6 is a perspective view of a nut key.

In the embodiment selected for illustration, I make use of a bolt I0 having an axial slot I2 in its end opposite the head I4. A rst nut I6 is threadedly connected with the bolt I0 and is provided with a plurality of radial grooves I8. A key 20 is receivable in the slot I2 and is provided with two fingers 22 receivable in two diametrically opposed grooves I8 in the nut I6.

A second nut 24 is threaded on the bolt Ill and is provided with a plurality of ears 26 normally lying in a plane ush with the face 28 of the nut 24 and bendable into position for engaging side faces of the nut I6.

In operation, the bolt is slipped through the aligned openings 3 formed in the parts 32 to be connected. The nut I6 is then tightened to clamp the parts 32 together and to bring two diametrically opposed grooves I8 into registration with the slot I2. The key 20 is then slid into the slot I2 of the bolt and its iingers 22 engaged in grooves I8 of lth'e nut I6, the nut 24 being then applied and screwed tightly into place against the nut I6, after which the ears 26 are bent to the position ofv Figure 3 for engaging the side faces of the nut I6.

It will thus be seen that the nut I6 is keyed against relative rotation with respect t0 the bolt I0 and that the ears 26 make the nut 24 secure against relative rotation both with' respect to the nut I6 and the bolt I0.

Without further elaboration, the foregoing will so fully illustrate my invention, that others may, by applying current knowledge, readily adapt the same for use under various conditions of service.

I claim:

In a nut lock, the combination of a threaded bolt having a longitudinally extending slot formed diametrically thereof, a iirst nut -provided with radial grooves in the outer end thereof, said nut being internally threaded for connection with' the bolt, a key receivable in the slot in the bolt, said key being of less width than the slot and having fingers extending from opposite sides of its inner end for engaging in the grooves, a second nut threadedly connected with said bolt for engagement with the first nut, and tongues extending laterally from the inner end of said second nut and bendable into engagement with side faces of said rst nut to restrain the second nut from relative rotation.

HUGH J. GALLAGHER. 

